third_party/libevent/compat/sys/_libevent_time.h

   1 /*      $OpenBSD: time.h,v 1.11 2000/10/10 13:36:48 itojun Exp $        */
   2 /*      $NetBSD: time.h,v 1.18 1996/04/23 10:29:33 mycroft Exp $        */
   3
   4 /*
   5  * Copyright (c) 1982, 1986, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)time.h      8.2 (Berkeley) 7/10/94
  33  */
  34
  35 #ifndef _SYS_TIME_H_
  36 #define _SYS_TIME_H_
  37
  38 #include <sys/types.h>
  39
  40 /*
  41  * Structure returned by gettimeofday(2) system call,
  42  * and used in other calls.
  43  */
  44 struct timeval {
  45         long    tv_sec;         /* seconds */
  46         long    tv_usec;        /* and microseconds */
  47 };
  48
  49 /*
  50  * Structure defined by POSIX.1b to be like a timeval.
  51  */
  52 struct timespec {
  53         time_t  tv_sec;         /* seconds */
  54         long    tv_nsec;        /* and nanoseconds */
  55 };
  56
  57 #define TIMEVAL_TO_TIMESPEC(tv, ts) {                                   \
  58         (ts)->tv_sec = (tv)->tv_sec;                                    \
  59         (ts)->tv_nsec = (tv)->tv_usec * 1000;                           \
  60 }
  61 #define TIMESPEC_TO_TIMEVAL(tv, ts) {                                   \
  62         (tv)->tv_sec = (ts)->tv_sec;                                    \
  63         (tv)->tv_usec = (ts)->tv_nsec / 1000;                           \
  64 }
  65
  66 struct timezone {
  67         int     tz_minuteswest; /* minutes west of Greenwich */
  68         int     tz_dsttime;     /* type of dst correction */
  69 };
  70 #define DST_NONE        0       /* not on dst */
  71 #define DST_USA         1       /* USA style dst */
  72 #define DST_AUST        2       /* Australian style dst */
  73 #define DST_WET         3       /* Western European dst */
  74 #define DST_MET         4       /* Middle European dst */
  75 #define DST_EET         5       /* Eastern European dst */
  76 #define DST_CAN         6       /* Canada */
  77
  78 /* Operations on timevals. */
  79 #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
  80 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
  81 #define timercmp(tvp, uvp, cmp)                                         \
  82         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
  83             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
  84             ((tvp)->tv_sec cmp (uvp)->tv_sec))
  85 #define timeradd(tvp, uvp, vvp)                                         \
  86         do {                                                            \
  87                 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;          \
  88                 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;       \
  89                 if ((vvp)->tv_usec >= 1000000) {                        \
  90                         (vvp)->tv_sec++;                                \
  91                         (vvp)->tv_usec -= 1000000;                      \
  92                 }                                                       \
  93         } while (0)
  94 #define timersub(tvp, uvp, vvp)                                         \
  95         do {                                                            \
  96                 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
  97                 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
  98                 if ((vvp)->tv_usec < 0) {                               \
  99                         (vvp)->tv_sec--;                                \
 100                         (vvp)->tv_usec += 1000000;                      \
 101                 }                                                       \
 102         } while (0)
 103
 104 /* Operations on timespecs. */
 105 #define timespecclear(tsp)              (tsp)->tv_sec = (tsp)->tv_nsec = 0
 106 #define timespecisset(tsp)              ((tsp)->tv_sec || (tsp)->tv_nsec)
 107 #define timespeccmp(tsp, usp, cmp)                                      \
 108         (((tsp)->tv_sec == (usp)->tv_sec) ?                             \
 109             ((tsp)->tv_nsec cmp (usp)->tv_nsec) :                       \
 110             ((tsp)->tv_sec cmp (usp)->tv_sec))
 111 #define timespecadd(tsp, usp, vsp)                                      \
 112         do {                                                            \
 113                 (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec;          \
 114                 (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec;       \
 115                 if ((vsp)->tv_nsec >= 1000000000L) {                    \
 116                         (vsp)->tv_sec++;                                \
 117                         (vsp)->tv_nsec -= 1000000000L;                  \
 118                 }                                                       \
 119         } while (0)
 120 #define timespecsub(tsp, usp, vsp)                                      \
 121         do {                                                            \
 122                 (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;          \
 123                 (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;       \
 124                 if ((vsp)->tv_nsec < 0) {                               \
 125                         (vsp)->tv_sec--;                                \
 126                         (vsp)->tv_nsec += 1000000000L;                  \
 127                 }                                                       \
 128         } while (0)
 129
 130 /*
 131  * Names of the interval timers, and structure
 132  * defining a timer setting.
 133  */
 134 #define ITIMER_REAL     0
 135 #define ITIMER_VIRTUAL  1
 136 #define ITIMER_PROF     2
 137
 138 struct  itimerval {
 139         struct  timeval it_interval;    /* timer interval */
 140         struct  timeval it_value;       /* current value */
 141 };
 142
 143 /*
 144  * Getkerninfo clock information structure
 145  */
 146 struct clockinfo {
 147         int     hz;             /* clock frequency */
 148         int     tick;           /* micro-seconds per hz tick */
 149         int     tickadj;        /* clock skew rate for adjtime() */
 150         int     stathz;         /* statistics clock frequency */
 151         int     profhz;         /* profiling clock frequency */
 152 };
 153
 154 #define CLOCK_REALTIME  0
 155 #define CLOCK_VIRTUAL   1
 156 #define CLOCK_PROF      2
 157
 158 #define TIMER_RELTIME   0x0     /* relative timer */
 159 #define TIMER_ABSTIME   0x1     /* absolute timer */
 160
 161 /* --- stuff got cut here - niels --- */
 162
 163 #endif /* !_SYS_TIME_H_ */